CN103255420A

CN103255420A - Titanium aluminide article with improved surface finish

Info

Publication number: CN103255420A
Application number: CN2013100487978A
Authority: CN
Inventors: B.P.布莱; J.S.詹森; 魏斌; 周幼东
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 2012-02-15
Filing date: 2013-02-07
Publication date: 2013-08-21
Anticipated expiration: 2033-02-07
Also published as: JP2013166236A; EP2628568A1; US20130210320A1; EP2628568B1; CN103255420B; US9011205B2; CA2805199C; JP6179933B2; CA2805199A1; BR102013002801A2

Abstract

Titanium-containing articles having improved surface finishes and methods for changing the surface of titanium containing articles, for example by removing overstock, are provided. One example method includes passing a fluid at high pressure across a surface of an titanium aluminide alloy-containing article, for example, a turbine blade, at high linear speed and deforming the surface of the titanium aluminide alloy-containing article, and removing material from the surface of the titanium aluminide alloy-containing article. Though aspects of the invention can be used in fabricating high performance turbine blades, the methods disclosed can be applied to the treatment of any titanium-containing article for which it is difficult to obtain an improved surface finish.

Description

The titanium aluminide goods that have the surface smoothness of improvement

Technical field

The present invention relates to have titanium aluminide (titanium aluminide) goods of the surface smoothness of improvement.

Background technology

Modern gas turbine, especially aircraft engine must satisfy the peak demand about reliability, weight, power, economy and operation work-ing life.In the exploitation of aircraft engine, material selects, play an important role in conformance with standard with aspect meeting the demands to the exploration of new suitable material and to the exploration of new preparation process etc.

The material that is used for aircraft engine or other gas turbine comprises titanium alloy, nickelalloy (being also referred to as superalloy) and high-strength steel.Titanium alloy is generally used for compressor part, and nickelalloy is applicable to the thermal part of aircraft engine, and high-strength steel is used for for example compressor case and turbine shell.High capacity or heavily stressed gas turbine components for example are used for the member of compressor, normally forged part.On the other hand, the member that is used for turbine is presented as the investment cast parts usually.

Because the high affinity of the element of metal pair such as oxygen, nitrogen and carbon, thereby be difficult in conventional investment pattern die investment cast titanium and titanium alloy and similar activity metal usually and realize good result.At high temperature, titanium and alloy thereof can react with the die surface coating.Any reaction between molten alloy and the mould all will cause the poor surface smooth finish of the finished product cast that caused by bubble.In some cases, the chemical property of aeration finished product cast, microtexture and character.

In case prepare the finished product member by casting, processing or forging, just need can be used for further improving surface smoothness before final the application at it usually.Micro-bulge on the component surface (asperity) and pit can reduce the aerodynamic performance in the turbine blade application, and are increased in the wearing and tearing/friction in rotation or the reciprocation parts application.

Under the situation of titanium aluminide turbine blade, cast air-foil spare can have the zone that is cast/forges oversizely in wedge shape part, aerofoil profile part or guard shield.For these thin stock zones are machined to final size, use mechanical workout (for example milling or grinding) or on-mechanical processing (for example electro-chemical machining) usually.Yet under any situation, tool processes and artificial cost are all higher, and cause manufacturing delay.

In addition, comprise the titanium aluminide cast product alloy limited ductility and can hinder the susceptibility of cracking and to use conventional grinding and polishing technology to the improvement of cast product surface smoothness.Therefore, need a kind of intermetallic compound base goods for the surface smoothness of using in aerospace application with improvement and for the manufacture of the correlating method of this goods.

Summary of the invention

One side of the present disclosure is a kind of for the method that removes material from the goods that contain titanium aluminide alloys.This method comprises: the goods that contain titanium aluminide alloys are provided; Make high pressure fluid through the described surface that contains the goods of titanium aluminide alloys; Make the surface deformation of the goods that contain titanium aluminide alloys; And remove material from the goods that contain titanium aluminide alloys.On the one hand, this method is provided with removing micro-bulge and pit from the surface of the goods that contain titanium aluminide alloys and does not make surface cracking or the damage of goods.On the one hand, the disclosure is the goods that contain titanium aluminide alloys that the above method of narrating of a kind of basis is made.

On the other hand, the disclosure is a kind ofly to remove the method for excess stock for the convex surface from the turbine blade that contains titanium aluminide, and described method comprises: the turbine blade that contains titanium aluminide alloys is provided; Make high pressure fluid through the described convex surface that contains the turbine blade of titanium aluminide; And remove about 0.025mm to the excess stock of about 5.0mm from the convex surface of the turbine blade that contains titanium aluminide.

In one embodiment, high pressure fluid contacts with the titanium aluminide microtexture.In another embodiment, high pressure fluid is selected from the group of being made up of rotation, translation, vibration or their combination from the motion of its nozzle that leaves.In one example, high pressure fluid passes through on the surface of the goods that contain titanium aluminide alloys with about 5 inches per minutes to about 100 inches per minutes.In one example, fluid comprises water, oil, ethylene glycol, alcohol or their combination.In one example, at fluid through before the surface of goods, from about 50 microns particle suspensions to about 400 microns scope fluid, and the solid loading of fluid counts about 10% to 40% by mass flow.In one embodiment, fluid with from about 50 microns to about 400 microns scope granule medium or pass through the surface of goods simultaneously.In another example, fluid is with granule medium or pass through the surface of goods simultaneously, and wherein, fluid also is included in from about 50 microns particles to about 400 microns scope.In one embodiment, fluid makes fluid can be heated to more than the room temperature through before the surface of goods.

Deforming step can for example comprise makes the titanium aluminide alloys viscous deformation.In one embodiment, after high pressure fluid is through the surface of goods that contains titanium aluminide alloys, the surface of goods vertically enter from product surface the goods less than about 100 microns degree of depth internal strain.In related embodiment, this degree of depth is less than about 10 microns.

In one example, titanium aluminide alloys comprises γ TiAl base mutually and α 2 (Ti ₃Al) phase.By putting into practice the method for current instruction, the roughness of product surface can reduce at least about 50%.In another embodiment, by putting into practice the method for current instruction, the roughness of product surface reduces at least about 25%.

In one embodiment, the surface that contains the goods of titanium aluminide alloys has the initial roughness greater than about 100Ra, and wherein, the roughness of product surface is reduced at least about 50Ra.In another embodiment, the roughness of product surface is reduced to 20Ra at least.In one embodiment, high pressure fluid comprises the high linear speed of the fluid of at least 5 inches per minutes.In one embodiment, high linear speed comprises 50 inches per minutes.In another embodiment, high linear speed comprises at least 100 inches per minutes.In another embodiment, high linear speed comprises at least 1000 inches per minutes.In a specific embodiment, high pressure fluid contains the surface of the alloy of titanium aluminide to the speed process of about 1000 inches per minutes with about 50 inches per minutes.

In one embodiment, the goods that contain titanium aluminide alloys comprise the engine that contains titanium aluminide alloys.In another embodiment, the goods that contain titanium aluminide alloys comprise the turbine that contains titanium aluminide alloys.In one embodiment, the goods that contain titanium aluminide alloys comprise the turbine blade that contains titanium aluminide alloys.In one embodiment, these goods have turbine engine blade less than the mean roughness (Ra) of about 20 microinchs at least a portion at the working-surface of blade.

In one example, high pressure fluid also comprises the particle of aluminum oxide, garnet, silicon-dioxide, silicon carbide, norbide, diamond, wolfram varbide and their synthetics.In one example, high pressure fluid with from about 50 microns to about 400 microns scope granule medium or pass through the surface of goods simultaneously.In another example, high pressure fluid with from about 20 microns to about 200 microns scope granule medium or pass through the surface of goods simultaneously.In another embodiment, these particles are from about 50 microns to about 150 microns.

In one embodiment, the roughness of product surface reduces at least about 25%.In another embodiment, the roughness of product surface reduces at least about 50%.In one embodiment, the surface has the initial roughness greater than about 100Ra, and wherein, the roughness of product surface is reduced to about 50Ra or littler after processing.In one embodiment, the roughness of product surface is reduced to 20Ra or littler after processing.That is, improvement comprises that the roughness with product surface is reduced to about 20Ra or littler.In another embodiment, improving the roughness that comprises product surface reduces greater than about 50Ra.In one embodiment, after processing, the Ra value is reduced to about 1/3 to about 1/6 times.In a specific example, the roughness of the product surface after the processing is less than about two microns.In another embodiment, the roughness of the product surface after the processing is less than about 1 micron.

Stabilization step comprise in one example with the described goods that contain titanium aluminide alloys fix, attached and be attached to one or more in the structure.Make high pressure fluid and/or contain the interaction mutually that can comprise the fluid that makes high pressure and/or medium and titanium aluminide microtexture such as the small-particle of garnet medium through the surface of goods.

Another aspect of the present disclosure is a kind of method of surface of the goods that contain titanium aluminide alloys for change, comprising: make the goods stabilization structurally that contains titanium aluminide alloys; Make fluid with the surface of high linear speed through the titanium aluminide alloys goods of described stabilization; And the γ titanium aluminide base phase and the α 2 (Ti that make titanium aluminide alloys ₃Al) mutually both distortion, wherein, material is removed from the surface of the goods that contain titanium aluminide alloys, and changes the surface of goods thus.On the one hand, the disclosure is the goods that contain titanium aluminide alloys that the above method of narrating of a kind of basis is made.

On the other hand, the disclosure is a kind of method of surface of the goods that contain titanium aluminide alloys for processing, and described method comprises: the goods that contain titanium aluminide alloys are provided; Make high pressure fluid through the described surface that contains the goods of titanium aluminide alloys; Make the surface deformation of the goods that contain titanium aluminide alloys; And remove material from the surface of the goods that contain titanium aluminide alloys.

On the other hand, the disclosure is a kind of for the method that removes excess stock from the goods that contain titanium aluminide alloys, comprising: the goods that contain titanium aluminide alloys are provided; Make high pressure fluid through the described surface that contains the goods of titanium aluminide alloys; Make the surface deformation of the goods that contain titanium aluminide alloys; And remove excess stock from goods, wherein, micro-bulge and pit removed from the surface of the goods that contain titanium aluminide alloys and do not make surface cracking or the damage of goods.

Description of drawings

When reading following detailed description with reference to the accompanying drawings, these and other feature, aspect and advantage of the goods that propose and method will become better understood, similar mark is represented similar parts in institute's drawings attached, and in the accompanying drawings:

Fig. 1 illustrates the perspective schematic view with respect to the fluid jet nozzle of aerofoil profile part location according to an embodiment.In this example, nozzle is located so that fluid jet and convex side such as the goods of aerofoil profile part interact, thereby removes excess stock from the convex side of goods.

Fig. 2 illustrates the perspective schematic view according to embodiment profile of goods before the high pressure fluid jet is handled and among Fig. 1 afterwards.

Fig. 3 illustrates a figure, and this illustrates the abrasive water jet flow nozzle with respect to an example of the configuration of processed blade surface.Fig. 1 to Fig. 3 illustrates for the scheme that removes 0.004 〃 from cast titanium aluminide vane trailing edge.

Fig. 4 is the synoptic diagram of describing for the space-time integration of the cloud atlas case of carrying out abrasive water-jet processing.

Fig. 5 illustrates the image of the blade of abrasive water-jet processing, shows zone 1 (former state (as-received)), zone 2 (usage example 1 preparation) and zone 3 (usage example 3 preparations).

Fig. 6 illustrates the image of the blade of abrasive water-jet processing, shows blade surface and the rear portion of zone 1 (former state), zone 2 (usage example 1 preparation) and zone 3 (usage example 3 preparations).

Fig. 7 is the image of the blade of abrasive water-jet processing, shows blade Background Region 1 (former state), zone 2 (usage example 1 preparation) and zone 3 (usage example 3 preparations).In zone 3, can see the unacceptable control that material is removed.

Fig. 8 a and Fig. 8 b illustrate according to some aspect of the present disclosure and are used for removing material and improving this surperficial schema from the surface of the goods that contain titanium aluminide alloys.

Embodiment

The disclosure relates generally to titaniferous and the goods of titanium alloy and the method that is used for improving the surface smoothness on this goods of the surface smoothness with improvement.In one example, the disclosure relates to turbine blade surface smoothness, that show excellent properties with improvement and preparation method thereof.

Conventional combustion gas and the design of steam turbine blade have the aerofoil profile part part of being made by metal or mixture fully usually.The all-metal blade comprises expensive wide string hollow blade, and is heavier on weight, thereby causes lower fuel performance and require more firm blade attached.In the gas turbine aviation applications, the gas-turbine blade of operating in hot-gas channel is exposed to the some of them top temperature in the gas turbine.Various designs make great efforts to increase life-span and the performance of blade in hot-gas channel always.As used herein, term " turbine blade " refers to steam turbine blade and gas-turbine blade.

Present application discloses, and the remarkable improvement of surface smoothness can be provided and improve performance such as the high shear rate local deformaton on the surface of the titanium aluminide member of turbine blade.An aspect provides the intermetallic compound base goods of the surface smoothness that has improvement, for example titanium aluminide based articles.In one embodiment, the titanium aluminide based articles of casting stands the high shear rate surface treatment, surface smoothness is improved to the roughness less than 20 microinchs (Ra).This new surface treatment has improved surface smoothness and do not introduced any extra damage or crack in the surface of member.

In one example, two-forty partial cut metamorphosis in from the surface to the member less than in about 100 microns degree of depth.In one embodiment, two-forty partial cut metamorphosis in from the surface to the member less than in about 10 microns degree of depth.This method that removes clout from goods is new for useful, and is different from the step of taking for glazed surface.In one example, in order to remove material from product surface, used high pressure fluid, wherein fluid passes through on the surface of goods.In another example, high pressure fluid is with comprising that the medium of size at the particle in about 50 microns to 400 microns scope uses, and wherein, fluid and granular mixture pass through on the surface of goods.An advantage of this method is that it does not need high rigidity or heavy instrument to come support component, as being the situation for milling.

Surfaceness abbreviates roughness usually as, is measuring superficial makings.It is quantized by the vertical deviation of real surface and their calculating mean value.If these deviations are bigger, then surface irregularity; If they are less, surface smoothing then.Roughness is regarded as high frequency, the short wavelength components of surface measurements usually.How roughness will play an important role aspect its environmental interaction at definite real-world object.For example, uneven surface weares and teares quickly than smooth-flat-surface usually and has higher frictional coefficient.

Crackle (flaw), ripple (waviness), roughness and lay (lay) are as general as the character that constitutes superficial makings.Crackle is involuntary, the unexpected and undesired interruption of the pattern of workpiece surface.The feature that crackle is normally isolated, for example burr, scratch and cut, and similar characteristics.Roughness refers to the pattern irregularity in high frequency (or short wavelength's) the superficial makings, and assessment is to the assessment of workpiece surface under the thinnest resolving power.Ripple refers to have the pattern irregularity than the longer wavelength of the roughness of workpiece surface or lower frequency in superficial makings.The vibration of machine or workpiece or deflection, instrument trembled etc. during ripple for example may be derived from and to make.

The term polishing causes the reduction of workpiece surface roughness.Lay is the main direction of the component of the pattern of superficial makings or superficial makings.Roughness can have different pattern and different lays with ripple on the specific workpiece surface.

The present inventor provides a kind of intermetallic compound base goods, titanium aluminide based articles for example, and its surface has the character of improvement, for example the mechanical integrity of the roughness of Jiang Diing and raising.On the one hand, institute's proposition technology comprises from the goods that contain titanium aluminide alloys and removes material.This method comprises: the goods that contain titanium aluminide alloys are provided; High pressure fluid is passed through on the described surface that contains the goods of titanium aluminide alloys; Make the surface deformation of the goods that contain titanium aluminide alloys; And remove material from the goods that contain titanium aluminide alloys.By putting into practice this method, micro-bulge and pit are removed from the surface of the goods that contain titanium aluminide alloys, and do not make surface cracking or the damage of goods.In one embodiment, remove and comprise and remove surfaceness and remove excess stock from goods.On the one hand, the disclosure is the goods that contain titanium aluminide alloys that the above method of narrating of a kind of basis is made.

Titanium alloy has high relative intensity and excellent erosion resistance, and has been mainly used in the field in space flight, deep-sea exploration, chemical plant etc.An example of titanium alloy is titanium aluminide.Titanium aluminide alloys generally includes γ titanium aluminide base phase and the α 2 (Ti of titanium aluminide alloys ₃Al) phase.

Comprise according to a kind of deforming step of technology and to make the titanium aluminide alloys viscous deformation; Because the viscous deformation of titanium aluminide alloys, in the alloy mutually at least one for good and all or become irreversibly deformed.Thereby this distortion of titanium aluminide alloys causes the interaction of fluid and titanium aluminide microtexture to realize by making high pressure fluid in the surface of goods process.Fluid is with high linear speed process on component surface, and the gained high shear rate produces the local surfaces distortion.In one embodiment, before the process of the surface of goods, comprise that the abrasive medium such as aluminum oxide or garnet particle is suspended in the fluid at fluid.Have or do not provide with the impact of the mixture of particle and remove micro-bulge and do not make surface cracking or damage required shearing.

Be selected from aluminum oxide, garnet, silicon-dioxide, silicon carbide, norbide, diamond, wolfram varbide and their synthetics at least one according to the abrasive medium of an example.Abrasive medium also can be the abradant jet of fluid.In certain embodiments, fluid is the abrasive material high-pressure spray of fluid, and comprises in aluminum oxide, garnet, silicon-dioxide, silicon carbide, norbide, diamond, wolfram varbide and their synthetics at least one.In one example, fluid comprises water.In certain embodiments, abrasive material is more hard, and polishing operation is more fast and efficient is more high.The repeated use of abrasive medium allows the economy of harder but more expensive abrasive material to use, and the result causes polishing the raising with the efficient of process operation, to increase polishing speed when needed.For example, aluminum oxide or silicon carbide can be substituted in using garnet polishing operation.

Abrasive water-jet polishing is in conjunction with 4 or 5 axis maneuvering capabilities provide fast, efficiently and cheaply mode is revised the cast construction geometrical shape, to meet the accurate requirement of final component sizes and required surface smoothness.By make the high pressure fluid that leaves nozzle have or not with the situation of abrasive medium under be out of shape through producing the high shear rate local surfaces on the surface of goods.High pressure fluid can be rotation, translation or vibration from the motion of its nozzle that leaves.For example, use this nozzle, can realize surpassing the linear speed of 50 inches per minutes, and this velocity level and size are combined at the abrasive particle in 50 microns to 400 microns scope and can be caused material (comprising clout) removing in a large number from the surface of intermetallic alloy goods.In one example, the speed of nozzle is 1 * 10 ^-3With 10 * 10 ^-3In the scope of inch per minute.

On the one hand, the disclosure is a kind ofly to remove the method for excess stock for the convex surface from the turbine blade that contains titanium aluminide, and this method comprises: the turbine blade that contains titanium aluminide alloys is provided; High pressure fluid is passed through in the convex surface of the turbine blade that contains titanium aluminide; And remove excess stock from the convex surface of the turbine blade that contains titanium aluminide.According to an example, by at the material that removes 0.025mm to 5mm from the otch (kerf) at jet exit predetermined distance place.According to an example, by remove the material of 0.5mm to 3mm at the otch from jet exit predetermined distance place.In one example, the material of about 1mm to 2mm is removed.

In one example, serve as that about 0.1cm is to about 5.0cm at nozzle that fluid leaves from it with high pressure with such as the gap between the surface of the workpiece of turbine blade.In related embodiment, the distance between nozzle and the workpiece surface is about 0.1cm, 1.0cm, 1.5cm, 2cm or 2.5cm.This distance is adjustable to suitable requirement to any given object.For example, if all other variablees remain unchanged, then jet hole is the closer to the surface of workpiece, leave nozzle and contact with workpiece surface and the impact of interactional fluid just more high.Nozzle is more near, and otch just more narrow-jet is limited better, so higher precision is possible, is offset but be the higher material removal rate of index.Otherwise, if nozzle away from workpiece, then the speed of removable material and/or quantity are less than when if the surface of the part to be removed of nozzle and workpiece keeps very close.Similarly, the angle of leaving the fluid contact workpiece surface of jet hole is to determine to remove the speed of material and/or the factor of quantity from workpiece surface.In one example, be fixed such as turbine blade or the another kind of workpiece that contains the goods of titanium aluminide alloys, and nozzle moves (referring to Fig. 1 to Fig. 3) with respect to the surface of workpiece.

According to the instruction of this paper, have or under high pressure do not discharge from nozzle with the fluid of abrasive medium, and pass through on the surface of the goods that contain titanium aluminide alloys.Pressure is generally about 5000 from the teeth outwards to about 10,000 pound per square inches.In one embodiment, lip-deep pressure is about 40,000 to about 80,000 pound per square inches.In another embodiment, the pressure of the fluid at jet hole place is that about 80,000 pound per square inches are to about 150,000 pound per square inches.The shearing force that is produced by the interaction between product surface and the high pressure fluid produces the local flow of inter-metallic compound material and does not make surface cracking or damage.This process removes micro-bulge and removes pit in the surface.The goods or the workpiece that contain titanium aluminide alloys comprise engine, turbine or the turbine blade that contains titanium aluminide alloys.

In one example, can comprise two operations or reach five operations through step.For example, the process step comprises is suspended in the fluid abrasive medium of different size, and this fluid then passes through at a high speed on the surface of the goods that contain titanium aluminide alloys.The size that constitutes the particle of abrasive medium is one side of the present disclosure.For example, the process step comprises is suspended in the fluid particles of different sizes, and make then and be suspended in the fluid and pass through from the teeth outwards at first abrasive medium from about 140 microns particles to about 195 microns scope, make then to be suspended in the fluid and from second abrasive medium of about 115 microns particles to about 145 microns scope process from the teeth outwards, and make then and be suspended in the fluid and pass through from the teeth outwards at the 3rd abrasive medium from about 40 microns particles to about 60 microns scope.

In one example, the abrasive medium of different size sequentially is suspended in the fluid, and fluid high speed process on the surface of goods, in order to contact with the surface of goods through the particle that reduces size in the period of product surface at fluid.For example, comprise at first making through step being suspended in the fluid and from the abrasive medium of about 70 microns particles to about 300 microns scope process from the teeth outwards, make then to be suspended in the fluid and to pass through from the teeth outwards at the abrasive medium from about 20 microns particles to about 60 microns scope.In another example, comprise at first making through step and be suspended in the fluid and pass through from the teeth outwards at the abrasive medium from about 140 microns particles to about 340 microns scope, make then to be suspended in the fluid and from the abrasive medium of about 80 microns particles to about 140 microns scope process from the teeth outwards, and further make then and be suspended in the fluid and pass through from the teeth outwards at the abrasive medium from about 20 microns particles to about 80 microns scope.

In a specific embodiment, the 3rd or last one abrasive medium relate to making and be suspended in the fluid and passing through from the teeth outwards from about 5 microns particles to about 20 microns scope.In a specific embodiment, last one abrasive medium relates to making and is suspended in the fluid and passing through from the teeth outwards from about 10 microns particles to about 40 microns scope.In related embodiment, last one abrasive medium can be from the teeth outwards second, third, the abrasive medium that suspends of the 4th or the 5th road.In one embodiment, the size of the unit of particle reflection particle.In another embodiment, the outside size of the unit of particle reflection particle, for example width or diameter.In certain embodiments, abrasive medium can be that the same substance that has different size is from the teeth outwards formed, and perhaps it can be that one or more different materials are formed.For example, abrasive medium is alumina particle and the garnet mixture that has the alumina particle of different size or have different size.

Consider the hardness of work surface and roughness and the surface smoothness that will reach, should be the minimum size consistent with required operation speed according to the particle size of the abrasive material of an exemplary embodiment.Generally speaking, the particle of abrasive material or " abrasive particle " size are more little, and the block of removable particle is more little, and the surface that obtains is more level and smooth.Abrasive material will have usually from be low to moderate about 50 microns to up to about 600 microns particle size.More commonly, the abrasive material grain-size will from about 100 to about 300 microns scope.

In one example, fluid selects the group that free water, oil, ethylene glycol, ethanol or their combination are formed.In one example, fluid the surface of goods through before, be entrained with in the fluid from about 50 microns particles to about 400 microns scope, and the solid loading of fluid counts about 10% to about 40% by mass flow.In one embodiment, the solid loading of fluid is about 5% to about 50%.In another embodiment, the solid loading of fluid is about 15% to about 30%.

Except the size of the particle that constitutes abrasive medium, the speed of particle on product surface and each time length through step also are controlled.In one embodiment, the goods that make particle cost be less than to come through a foot in 1 minute through speed.In another embodiment, the particle cost comes the goods through a foot between 10 seconds to 40 seconds.In another embodiment, the particle cost comes the goods through a foot between 1 second to 20 seconds.

On the one hand, high pressure fluid has high linear speed.This high linear speed comprises 50 inches per minutes, is at least 100 inches per minutes in another example, and is at least 1000 inches per minutes in another example.This refers to the linear speed of the jet on the direct of travel of bit when bit moves.In certain embodiments, the fluid that has abrasive medium passes through with about 50 inches per minutes to the high linear speed of about 1000 inches per minutes on the surface of the goods that contain titanium aluminide alloys.Describe in linear speed under the situation of jet self speed, in one example, this speed is from about 200m/s to about 1000m/s, and is from about 300m/s to about 700m/s in another example.In one example, the fluid that has an abrasive medium on the surface of goods through and interact with the titanium aluminide microtexture.

The method that is used for the current instruction that material removes from the high shear rate on the surface that contains the titanium aluminide goods allows the smoothing processing on surface and the elimination of the micro-bulge on the product surface and pit.That is, the method for current instruction allows to remove material and do not produce surface crack or other damage at product surface from goods.According to instruction of the present disclosure, the local plastic deformation of titanium aluminide alloys takes place only to contain usually in 10 to 150 microns the degree of depth.Yet this technology with at least one the phase viscous deformation that wherein contains titanium aluminide alloys forms contrast.In one embodiment, make fluid through before the surface of goods, fluid is heated to more than the room temperature.The feature of the technology that proposes is the mutually interactional mode in the following alloy microstructure in surface deformation process and surface wherein.

The process of current method taught and deforming step can sequentially be repeated, up to the roughness value of realizing that the expectation of material from product surface removes or expect.In one example, the surface of the high-performance products of expectation such as turbine blade, turbine stator blade/nozzle, turbo-supercharger, reciprocator valve, piston etc. has about 20 microinchs or littler roughness (Ra).In some cases, process and deforming step sequentially repeat at least twice.In some cases, process and deforming step sequentially repeat repeatedly, and wherein, fluid suspended thing comprises the abrasive medium of the size that has different size or reduce in proper order.This process is carried out up to the surface smoothness that obtains expectation.For example, comprise making through step and be suspended in the fluid and pass through from the teeth outwards at first abrasive medium from about 140 microns particles to about 195 microns scope, make then to be suspended in the fluid and from second abrasive medium of about 115 microns particles to about 145 microns scope process from the teeth outwards, and make then and be suspended in the fluid and pass through from the teeth outwards at the 3rd abrasive medium from about 40 microns particles to about 60 microns scope.

Compare the method for current instruction, usually, the surperficial refine (finish) of titanium aluminide member is undertaken by the milling of multiaxis line, grinding, abrasive polishing, rolling process or chemical rightenning.Compare the method for current instruction, mechanical means brings the risk of surface damage, and chemical process is consuming time.There is limitation in this conventional processing on the surface smoothness that may produce all the time.The power of being introduced by these batch machining technology can cause the stress of not expecting, this stress can cause the surface cracking of member.The limited ductility of typical titanium aluminide cast product and the susceptibility of cracking limited used conventional grinding and polishing technology to the improvement of cast product surface smoothness.Institute's proposition technology provides the surface smoothness of improving and the risk that greatly reduces above-mentioned shortcoming.

Another aspect of the present disclosure is a kind of method of surface of the goods that contain titanium aluminide alloys for change.In one embodiment, this method comprises: make the goods stabilization structurally that contains titanium aluminide alloys; Fluid is passed through on the surface of the titanium aluminide alloys goods of stabilization with high linear speed; And the γ titanium aluminide base phase and the α 2 (Ti that make titanium aluminide alloys ₃Al) mutually both distortion, wherein, material is removed from the surface of the goods that contain titanium aluminide alloys, and changes the surface of goods thus.Stabilization step comprise in one example with the described goods that contain titanium aluminide alloys fix, attached and be attached to one or more in the structure.Make the fluid process on the surface of goods that comprises abrasive medium, wherein, between the phase of the fluid that comprises abrasive medium and titanium aluminide microtexture, exist to interact.On the one hand, the disclosure is the goods that contain titanium aluminide alloys that the above method of narrating of a kind of basis is made.In one embodiment, the goods that contain titanium aluminide alloys comprise the engine that contains titanium aluminide alloys, contain the turbine of titanium aluminide alloys or contain the turbine blade of titanium aluminide alloys.

On the other hand, the disclosure is a kind of method of surface of the goods that contain titanium aluminide alloys for processing, and this method comprises: the goods that contain titanium aluminide alloys are provided; High pressure fluid is passed through on the surface of the goods that contain titanium aluminide alloys; Make the surface deformation of the goods that contain titanium aluminide alloys; And remove material from the surface of the goods that contain titanium aluminide alloys.

On the other hand, the disclosure is a kind of for the method that removes excess stock from the goods that contain titanium aluminide alloys, comprising: the goods that contain titanium aluminide alloys are provided; High pressure fluid is passed through on the surface of the goods that contain titanium aluminide alloys; Make the surface deformation of the goods that contain titanium aluminide alloys; And remove clout from goods, wherein, also micro-bulge and pit are removed from the surface of the goods that contain titanium aluminide alloys and do not make surface cracking or the damage of goods.

The technology that proposes be a kind of method of Ra value of the surface for reducing the goods that contain titanium aluminide alloys on the other hand, comprising: make structurally stabilization of titanium aluminide alloys; Abrasive particle that the size that suspends in the fluid reduces is in proper order under high pressure at full speed passed through on the surface of the titanium aluminide alloys of stabilization; And the TiAl base phase and the α 2 (Ti that make titanium aluminide alloys ₃Al) both viscous deformation mutually, and reduce the Ra value on titanium aluminide alloys surface thus.

An example of the technology that proposes relates to from the surface that contains the titanium aluminide goods by casting preparation and removes material, for example excessive excess stock (referring to for example Fig. 1 to Fig. 3).The type that the root a tree name is particles used and size thereof and situation, comprise comprise particle fluid on goods through how long, can obtain to compare the goods that contain titanium aluminide that reduced the Ra value before handling.The Ra value of 70 microinchs is corresponding to about 2 microns; And the Ra value of 35 microinchs is corresponding to about 1 micron.Usually the surface of the high-performance products of requirement such as turbine blade, turbine stator blade/nozzle, turbo-supercharger, reciprocator valve, piston etc. has about 20 microinchs or littler Ra.By putting into practice the method for current instruction, the roughness of product surface reduces at least about 50%.For example, the surface that contains the goods of titanium aluminide alloys has the Initial R a greater than about 100 microinchs, and wherein, the Ra of product surface is reduced to about 50 microinchs or littler after processing.On the one hand, the disclosure is the goods that contain titanium aluminide alloys, turbine blade for example, and it has on its surperficial at least a portion less than about 1 micron roughness.

In one example, the roughness of the product surface after the processing is about 20 microinch Ra or littler.In another example, the roughness of the product surface after the processing is about 15 microinch Ra or littler.In another embodiment, after processing, the Ra value is reduced to 10 microinchs or littler.In certain embodiments, after processing, the Ra value is reduced to about 1/3 to about 1/6.For example, after processing, the Ra value is reduced to about 1/5.In one embodiment, the Ra value is from being improved to after processing level less than 20 microinchs in the level of 70-100 microinch on the foundry goods before processing.

According to the instruction of proposition technology, the roughness of product surface can reduce at least about 25%.In some cases, the roughness of product surface reduces at least about 50%.In one embodiment, with handle before level when comparing, the roughness of product surface can reduce by 20% to 80%.In one embodiment, with handle before level when comparing, the roughness of product surface can be reduced to about 1/2.In one embodiment, with handle before level when comparing, the roughness of product surface can be reduced to about 1/4.In one embodiment, with handle before level when comparing, the roughness of product surface can be reduced to about 1/6.In one embodiment, with handle before level when comparing, the roughness of product surface can be reduced to about 1/8.In one embodiment, with handle before level when comparing, the roughness of product surface can be reduced to about 1/10.In another embodiment, with handle before level when comparing, the roughness of product surface can be reduced to about 1/2 to about 1/10.

The surface that contains the goods of titanium aluminide alloys can have the initial roughness greater than about 100 microinch Ra, and after processing, the roughness of product surface is reduced to about 50 microinch Ra or littler.In another embodiment, the roughness of product surface is reduced to about 20 microinch Ra or littler.In one embodiment, the surface that contains the goods of titanium aluminide alloys has the initial roughness of about 120 microinch Ra, and this roughness is reduced to about 20 microinch Ra after processing.In one embodiment, the surface that contains the goods of titanium aluminide alloys has the initial roughness of about 115 microinch Ra, and this roughness is reduced to about 10 microinch Ra after processing.In one embodiment, the surface that contains the goods of titanium aluminide alloys has 110 microinch Ra or bigger initial roughness, and this roughness is reduced to 30 microinch Ra or littler after processing.

Present embodiment provides the finished product that has flawless substantially surface.In addition, by the instruction of the practice technology that proposes, the finished product of acquisition (for example, turbine blade) have at least a portion of product surface less than 50 microinchs and in alternatives less than the roughness of 10 microinchs.

An aspect is a kind of goods that contain titanium aluminide alloys, and its at least a portion on the surface that contains titanium aluminide alloys has less than about one micron roughness.In one embodiment, these goods are cast product.In one example, these goods are the investment cast goods.In another example, these goods are heat-treated or process by hot isostatic pressing.Hot isostatic pressing (HIP) is a kind of be used to the porosity that reduces metal and increase the manufacturing process of the density of many stupaliths.This has improved mechanical properties and the workability of material.HIP technology makes member stand high temperature in the hyperbaric environment such as the reactor housing container and waits pneumostatic to press both.Argon is typically used as gas under pressure.The rare gas element of use such as argon makes goods that chemical reaction not take place.Chamber is heated, and causes the pressure of internal tank to increase, thereby from all directions goods is exerted pressure (therefore being called " waiting static pressure ").In one example, apply rare gas element between 7,350 psi (50.7MPa) and 45,000 psi (310MPa), 15,000psi (100MPa) is an example.

Goods can be engine or turbine.In a specific embodiment, goods are turbine blade.In another embodiment, the goods that contain titanium aluminide alloys comprise the turbine blade that contains titanium aluminide alloys.In one example, the goods that contain titanium aluminide alloys are turbine blade, and at least a portion of the working-surface of turbine blade has the Ra roughness less than about 40 microinchs.In another embodiment, the major part of the surf zone of titanium aluminide alloys goods is for smooth and have a roughness less than about 20 microinch Ra basically.In a specific embodiment, goods have turbine engine blade less than the mean roughness of about 15 microinch Ra at least a portion at the working-surface of blade.

Conventional abrasive water-jet (AWJ) is used for to cut the jet cutting metal of wearing workpiece material fully.The modified version that the disclosure is used AWJ produces scraping cutting or surface finish.Abrasive water-jet is set to skim at workpiece surface, is used for component surface is carried out light cut or polishing.The AWJ method is arranged for revising casting clout sum of errors parts is carried out refine processing, to satisfy tolerance and surface smoothness requirement.Jet moves with respect to workpiece along the profile of workpiece by the tool path of complexity.Relative movement is provided by multiaxis line CNC driving mechanism.Workpiece profile in the fluidic spaces outline process zone.

Water jet is a kind of Ginding process and has low cutting force.Another advantage is that the tool processes cost is lower.Another advantage of the method for current instruction is that high-pressure spray cuts and polishing material with the high speed that removes, thereby causes low cycling time.The abrasive water-jet polishing also available jet that has controlled tool path is carried out.This is the alternative approach to routine processing and surface polishing method.

Usually, will desirably adopt concentration in preparation to be in abrasive material by the level of quality flowmeter from about 10% to about 30%.Relevant with the spatial concentration of abrasive material to the speed that goods are processed, and guarantee that preferably concentration is enough to be implemented in required process cycling time and the productivity of optimum efficiency in the processing of titanium-containing articles.Do not have the accurate lower limit to abrasive concentration, but should keep firmly in mind, abrasive material content is the main determining factor of the cutting power of medium, and crosses when low when content, and required distortion may not take place.When adopting the abrasive material of lower concentration, can adopt for other technology that realizes required cutting power, for example increase jet pressure and speed.Use the surface deformation finishing method of high pressure fluid to produce the member of the surface smoothness that has improvement, and compare conventional milling and method for grinding and have some advantages.For example, institute's proposition technology provides the fast and simple method that is used for providing the surface smoothness of improvement when producing the least surface defective.This method has low cost, and also is fit to high-speed automated.

Showing about the typical documentation ﹠ info of abrasive water-jet cutting and those skilled in the art's general knowledge, the randomness that the abrasive grain in the jet distributes hinders the user to have to be better than ± the roughing cut precision of 0.010 〃.Therefore, the applicant believes that prior art/those skilled in the art's knowledge is with the roughing cut of AWJ process limitations in block materials.Usually, the abrasive water-jet cutting is used to cut fully wears object, rather than is used for surface working.The invention describes the new mode of a kind of abrasive water-jet milling or processing, it allows to remove in a controlled manner a spot of material (0.001 〃 to 0.020 〃).As the Typical Disposition of the described surperficial abrasive water-jet milling of the disclosure for example shown in Fig. 1 to Fig. 3.

Compare the technician's in abrasive water-jet cutting field existing practice, the disclosure is directly used the randomness of the size distribution in the water jet and is realized removing material from the surface of band clout parts in conjunction with high mass flow rate, rather than the cutting of impenetrating thickness.The present invention's control is also adopted the abrasive water-jet otch.Usually in working angles, " otch " is considered to cause the feature (otch is defined as the width of the groove made by cutting tool in routine processing) of material unaccounted-for (MUF), and therefore is harmful to.

Yet in the disclosure, otch is redefined the time series integration into the spatial distribution of abrasive material in the jet that impacts work surface in a series of different times, described in Fig. 4.This integral result is for being used for describing the probability density function (PDF) of cutting geometrical shape.Otch is controlled, and makes it constructively to be used for removing excess stock from parts in a controlled manner.The cutting geometrical shape is the spitting image of the side of conventional milling cutter, except the residence time (its rate of translation by rate of feed or jet is controlled) is directly controlled the material removal rate.Control to jet characteristics and jet motion is worked in the control material removal rate.

Example.

By with reference to following example, can be more readily understood the technology of having described generally, these examples only are to be included for some aspect and embodiment are described, and are not intended restriction system and method by any way.

Can calculate roughness value to profile or surface.The profile roughness parameter (Ra, Rq ...) more common.In the roughness parameter each uses the formula that is used for the description surface to calculate.There are many different roughness parameters using, but R _aBe modal at present.Other common parameter comprises R _z, R _qWith R _Sk

Average roughness Ra is represented with height unit.In (English system) system of imperial family, " 1,000,000/" that the 1Ra ordinary representation is an inch.This is also referred to as " microinch ".Ra value shown in this article refers to microinch.Amplitude parameter characterizes the surface based on the vertical deviation of coarse profile and average line.Profilograph is to use stylus to follow the trail of and determine the device of its mean roughness along parts surface.

Surfaceness is described by the single number such as Ra.Have many different roughness parameters using, but Ra is modal.All these parameters are simplified to individual digit with all information in the surface profile.Ra is the arithmetical av of absolute value, and R _tIt is the scope of collected coarseness data point.Ra one of measures surface smoothness the most common.

Following table provides the comparison of the typical case who uses surfaceness being measured the surfaceness of description.

Roughness value Ra (micron)	Roughness value Ra (microinch)	Roughness (grade)
			50	2000	N12
25	1000	N11
			12.5	500	N10
8.3	250	N9
			3.2	125	N8
1.6	63	N7
			0.8	32	N6
0.4	16	N5
			0.2	8	N4
0.1	4	N3
			0.05	2	N2
0.025	1	N1

In one example, nozzle is provided so that it contacts with workpiece such as turbine blade, as shown in Figure 1.Here, the longitudinal axis of the jet that penetrates from nozzle aligns as shown in Figure 1, and after the cast air-foil spare that clout is arranged from convex side removed material, jet moved with respect to band clout parts by the profile on surface to be prepared.Water jet is set to provide the jet such as the fluid of water, and it comprises and for example has about 50 garnet or yttrium aluminate particles to about 600 microns size.Used high pressure fluid jet has 0.030 inch round nozzle aperture diameter.Jet moves with respect to the tool path of workpiece along complexity, and provides relative movement by multiaxis line CNC driving mechanism.Band clout foundry goods only has for example excess stock of 1mm at the convex side of aerofoil profile part.

Adopt clout with allow sclerosis during casting shrink, with the mould reaction, during heating treatment with environment reaction, and adapt to size variation in the casting that can during the final processing of parts, adapt to.The space profiles of abrasive ejector nozzle is configured to follow the workpiece profile in the zone of the blade on nonreentrant surface, and in this zone, excess stock must be removed (referring to Fig. 2, changing before the profile shown in it and example afterwards).The thickness range of the material that available skim cut removes is from about 0.05mm to about 5.0mm.In a concrete example, can remove about 0.1mm to the material of about 2.5mm with skim cut.In one embodiment, can adopt and have such as groove and the nozzle of non-circular alternative geometries; Also can adopt other nozzle geometry that may be more suitable for airfoil profile.

In one embodiment, the abrasive particle that uses the 150-300 micron-scale is with the prune away excess stock of bulk of the linear speed of 10 inches per minutes.In this operating period, otch serves as saw to remove the material of bulk.In another embodiment, the otch further from injection stream serves as the diffusion contact mechanism that allows the time control depth of cut.This experiment is by becoming it 10 ° away from vertical axis is carried out be with blades oriented.Cutting and is carried out under the vibration of for example 100 inches per minutes at a high speed under the low speed of for example 2 inches per minutes to and fro.Also estimate cutting with the influence of determining the exposure duration variable and to the influence of depth of cut.The surfaceness of parts is less than 80 microinch Ra, and the amount of the material that removes be one inch 4/1000ths.

Three following additional example have been described the abrasive water-jet processing to the turbine blade trailing edge, parts are refined to final size.Fig. 3 shows for the zone in about 1 〃 of trailing edge and removes the experimental program of 0.004 〃 from the turbine blade/convex surface of aerofoil profile part.The goods (being turbine blade in the case) that contain titanium aluminide are placed in the anchor clamps to stablize it.Anchor clamps are arranged on the rotation, make that blade can be around the axis rotation that is parallel to longitudinal blade axis.Blade is oriented on the anchor clamps, makes the surface of bucket platform directly lie on the horizontal reference line of anchor clamps.Rolling clamp then makes the tangent line of the rear edge surface in 1 〃 of rear edge surface depart from 10 ° of vertical axis that overlap with water jet nozzle and presents.

The photographs of processed vane trailing edge is shown in Fig. 5 to Fig. 7.The concrete zone of paying close attention to is designated as

zone

1,2 and 3 in image.Zone 1 is starting materials, and the 2 finished surfaces of abrasive water-jet that show in the example 1, zone, and is as mentioned below.The 3 finished surfaces of abrasive water-jet that show in the example 3, zone, as mentioned below.The surface smoothness that obtains in example 1 and example 2 is acceptable, and the surface smoothness that obtains in example 3 is unacceptable.

In first example, parts are contacted roughly with jet, and jet is moved along the longitudinal axis of blade in the following manner, successfully remove material with the convex surface from blade.Jet is vibrated in the zone of length 2 〃 that are parallel to longitudinal axis with the maximum rate of feed of about 100 inches per minutes.Carry out four complete circulations (+2 〃 ,-2 〃), the gained surface is presented in the photo of Fig. 5 to Fig. 7 in the zone 2; These illustrate the different skeleton views on finished surface.The titanium aluminide of about 0.004 〃 is successfully removed in a controlled manner.Original surface before the processing can be seen in the zone 1 of the photo of Fig. 5 to Fig. 7.In the excellent surface smooth finish (for example, referring to Fig. 8) of the surface of abrasive water-jet milling acquisition less than 80 microinch Ra.

In second example, the titanium aluminide turbine airfoil is contacted roughly with abrasive water-jet, and jet is moved in the following manner along the longitudinal axis of blade: with first example in the zone of different vane trailing edge, on the lateral length of about 1 〃 of the longitudinal axis that is parallel to blade, with the slow speed continuous moving jet of about 1 inch per minute.The material of about 0.004 〃 is successfully removed.Acquisition is less than the surface smoothness of the Ra of 80 microinchs.

In the 3rd example, parts are contacted roughly with abrasive water-jet in the new region of former state blade, and along the longitudinal axis translation jet of blade.The motion of jet on blade surface is interrupted, and speed approaches zero.When the speed step-down also approached zero, the speed that material removes significantly increased, and control removes the ability reduction of the amount of material.For example, in zone 3, when jet speed approaches zero and keep in placely when reaching 5 seconds, remove the material of maximum ga(u)ge 0.025 〃 in uncontrollable mode; In the surface of turbine blade, produce the groove of not expecting.Different with the situation in example 1 and the example 2, in example 3, cannot fully control the speed of material.Can see this processing response on the surface of the blade in Fig. 5 and on the vane trailing edge among Fig. 6 and Fig. 7.

The abrasive water-jet process operation uses the 4 axis cnc machine tools that have conventional high-pressure water shot streaming system to carry out.In describe each in three examples, adopt the standard garnet (distribution of 150-300 micron particle) of 1 pound of per minute of mass flow rate, and adopt the hydraulic pressure of 85,000 pound per square inches.

Abrasive water-jet only represents according to one of possible some angle presentations of the material amount of removing of expectation with this 10 ° angle presentation of wanting the surface of milling/processing.Usually, angle is more steep, and zone processed or polishing is more little, and operation is more fast.More shallow angle will cause bigger material to remove linearity range, and it is slower to remove material, thereby allow control more subtly.The preferable range of angle presentation is 5 to 20 degree.In another embodiment, the scope of angle presentation is 7 to 12 degree.In one embodiment, this angle is about 10 degree.

Should be appreciated that above description is intended that illustrative rather than restrictive.For example, above-described embodiment (and/or its aspect) use that can be bonded to each other.In addition, can being taught in of each embodiment do not broken away under the situation of its scope and make many modifications, to be fit to specific situation or material.Though the size of material described herein and type intention limit the parameter of each embodiment, these embodiment are restrictive anything but, and only are exemplary.By looking back above description, the those skilled in the art of many other embodiment will be apparent.Therefore, the scope of each embodiment should be determined together with the four corner of the equivalent of authorizing these claims jointly with reference to claims.In claims, term " comprises " and " therein " is used as that corresponding term " comprises " and the general English equivalent of " wherein ".In addition, in claims, term " first ", " second " and " the 3rd " etc. are only with making a check mark, and are not intended its object is forced digital requirement.In addition, the restriction of claims also adds the format writing of function not according to device, and be not intended to explain for the 6th section of the 112nd article according to united states patent law, unless the restriction of this class claim clearly use phrase " be used for ... device " add the function statement that does not have other structure.Should be appreciated that not necessarily above-mentioned all these type of purposes or advantage can realize according to any specific embodiment.Therefore, for example, those skilled in the art will recognize that, can be realizing or to optimize as the mode of one or one group advantage teaching herein embodies or realizes system as herein described and technology, and needn't realize other purpose or the advantage that this paper may instruct or advise.

Though describe the present invention in detail in conjunction with the embodiment of limited quantity only, should understand easily, the invention is not restricted to disclosed like this embodiment.But the present invention can be modified to incorporate into before this any amount of modification, change, replacement or the equivalent arrangements of not describing but matching with the spirit and scope of the present invention.In addition, though various embodiment of the present invention has been described, should be appreciated that aspect of the present invention can comprise in the described embodiment more only.Therefore, the present invention is not regarded as by previous description restriction, but only by the scope restriction of claims.All publications that this paper mentions, patent and patent application are incorporated herein by reference in full, are expressed as by reference particularly and independently as each independent publication or patent and incorporate into.Having under the situation of conflict, will be as the criterion to comprise the application in any being defined in herein.

This written description usage example comes open the present invention, comprises best mode, and makes those skilled in the art can implement the present invention, comprises making and using any device or system and carry out any method that is included.Patentable scope of the present invention is defined by the claims, and can comprise other example that those skilled in the art expect.If this other example has the structural element that does not have difference with the literal language of claim, if perhaps they comprise the equivalent structure element that does not have essential difference with the literal language of claim, then this other example intention within the scope of the claims.

Claims

1. method that is used for removing from the goods that contain titanium aluminide alloys material comprises:

The goods that contain titanium aluminide alloys are provided;

Make high pressure fluid through the described surface that contains the goods of titanium aluminide alloys;

Make the described surface deformation that contains the goods of titanium aluminide alloys; And

Remove material from the described goods that contain titanium aluminide alloys, wherein, micro-bulge and pit are removed from the described surface that contains the goods of titanium aluminide alloys and do not make surface cracking or the damage of described goods.

2. method according to claim 1 is characterized in that, described fluid is with granule medium or pass through the surface of described goods simultaneously, and wherein, and described fluid also is included in from about 50 microns particles to about 400 microns scope.

3. method according to claim 1 is characterized in that, high pressure fluid is selected from the group of being made up of rotation, translation, vibration or their combination from the motion of its nozzle that leaves.

4. method according to claim 1 is characterized in that, the group that described fluid selects free water, oil, ethylene glycol, ethanol or their combination to form.

5. method according to claim 1, it is characterized in that, at described fluid through before the surface of described goods, from about 50 microns particle suspensions to about 400 microns scope described fluid, and wherein, the solid loading of described fluid counts about 10% to 40% by mass flow.

6. method according to claim 1 is characterized in that, described fluid passes through on the described surface that contains the goods of titanium aluminide alloys with about 2 inches per minutes to about 100 inches per minutes.

7. method according to claim 1, it is characterized in that, after the described fluid surface through the described goods that contain titanium aluminide alloys, the surface of described goods the Surface Vertical from described goods enter the described goods less than about 100 microns degree of depth internal strain.

8. method according to claim 1 is characterized in that, described titanium aluminide alloys comprises γ titanium aluminide base mutually and α 2 (Ti ₃Al) phase.

9. method according to claim 1 is characterized in that, the described goods that contain titanium aluminide alloys comprise the turbine blade that contains titanium aluminide alloys.

10. method according to claim 1 is characterized in that, the roughness on the surface of described goods reduces at least about 50%.

11. method according to claim 1 is characterized in that, described fluid also comprises the particle of aluminum oxide, garnet, silicon-dioxide, silicon carbide, norbide, diamond, wolfram varbide and their synthetics.

12. method according to claim 1 is characterized in that, the described step that removes comprises that the roughness with the surface of described goods reduces greater than about 50 microinch Ra.

13. method according to claim 1 is characterized in that, the roughness on the surface of the described goods after the processing is less than about two microns.

14. the method for the surface that changes the goods that contain titanium aluminide alloys comprises:

Make structurally stabilization of the described goods that contain titanium aluminide alloys;

Make fluid with the surface of high linear speed through the titanium aluminide alloys goods of described stabilization; And

Make γ titanium aluminide base phase and the α 2 (Ti of described titanium aluminide alloys ₃Al) distortion mutually, wherein, material is removed from the described surface that contains the goods of titanium aluminide alloys, and changes the surface of described goods thus.

15. method according to claim 14 is characterized in that, described high pressure fluid with from about 50 microns to about 400 microns scope granule medium or pass through the surface of described goods simultaneously.

16. method according to claim 14 is characterized in that, described fluid passes through on the described surface that contains the goods of titanium aluminide alloys with about 5 inches per minutes to about 1000 inches per minutes.

17. method according to claim 14, it is characterized in that, after the described high pressure fluid surface through the described goods that contain titanium aluminide alloys, the surface of described goods the Surface Vertical from described goods enter the described goods less than about 100 microns degree of depth internal strain.

18. method according to claim 14 is characterized in that, the described goods that contain titanium aluminide alloys comprise the turbine blade that contains titanium aluminide alloys.

19. method according to claim 14 is characterized in that, the roughness on the surface of described goods reduces at least about 50%.

20. method according to claim 14 is characterized in that, described high pressure fluid also comprises the particle of aluminum oxide, garnet, silicon-dioxide, silicon carbide, norbide, diamond, wolfram varbide and their synthetics.

21. method according to claim 14 is characterized in that, the group that described fluid selects free water, oil, ethylene glycol, ethanol or their combination to form.

22. method according to claim 14, it is characterized in that, at described fluid through before the surface of described goods, from about 50 microns particle suspensions to about 400 microns scope described fluid, and wherein, the solid loading of described fluid counts about 10% to 40% by mass flow.

23. method according to claim 14 is characterized in that, after processing, described Ra value is reduced to about 1/3 to about 1/6.

24. method according to claim 14 is characterized in that, the roughness on the surface of the described goods after the processing is less than about two microns.

25. goods that contain titanium aluminide alloys of making according to the method described in the claim 1.

26. the method for the surface that processes the goods that contain titanium aluminide alloys, described method comprises:

The goods that contain titanium aluminide alloys are provided;

Remove material from the described surface that contains the goods of titanium aluminide alloys.

27. method according to claim 26 is characterized in that, described high pressure fluid with from about 50 microns to about 400 microns scope granule medium or pass through the surface of described goods simultaneously.

28. method according to claim 26 is characterized in that, described fluid passes through on the described surface that contains the goods of titanium aluminide alloys with about 50 inches per minutes to about 1000 inches per minutes.

29. method according to claim 26, it is characterized in that, after the described high pressure fluid surface through the described goods that contain titanium aluminide alloys, the surface of described goods the Surface Vertical from described goods enter the described goods less than about 100 microns degree of depth internal strain.

30. method according to claim 26 is characterized in that, the described goods that contain titanium aluminide alloys comprise the turbine blade that contains titanium aluminide alloys.

31. method according to claim 26 is characterized in that, described high pressure fluid also comprises the particle of aluminum oxide, garnet, silicon-dioxide, silicon carbide, norbide, diamond, wolfram varbide and their synthetics.

32. method according to claim 26, it is characterized in that, before the described fluid process surface of described goods, from about 50 microns particle suspensions to about 400 microns scope described fluid, and wherein, the solid loading of described fluid is that about 2000 grams whenever are raised to every liter of about 5000 gram.

33. a method that is used for removing from the convex surface of the turbine blade that contains titanium aluminide excess stock, described method comprises: the turbine blade that contains titanium aluminide alloys is provided; Make high pressure fluid through the described convex surface that contains the turbine blade of titanium aluminide; And remove about 0.025mm to the excess stock of about 5.0mm from the described convex surface that contains the turbine blade of titanium aluminide.